Voradej Kriengsantikul และ Sirichan Thongprasert. (2010) ASSESSMENT OF ECO 8 EFFICIENCY AND APPLICATION OF MATHEMATICAL MODEL FOR CEMENT MANUFACTURING. <i>KKU Engineering Journal</i>, <i>37</i>(4), 277-285.Voradej Kriengsantikul และ Sirichan Thongprasert. "ASSESSMENT OF ECO 8 EFFICIENCY AND APPLICATION OF MATHEMATICAL MODEL FOR CEMENT MANUFACTURING". KKU Engineering Journal 37 (2010):277-285.Voradej Kriengsantikul และ Sirichan Thongprasert. ASSESSMENT OF ECO 8 EFFICIENCY AND APPLICATION OF MATHEMATICAL MODEL FOR CEMENT MANUFACTURING. Faculty of Engineering, Khon Kaen Univeristy:ม.ป.ท. 2010.